But everytime I use Windows and Macs again, I get even more annoyed. Mainly with how slow things are. Even on a new Windows 10 desktop or laptop, it's not uncommon to have to wait minutes for things to settle down after booting and logging in, or waiting while updates are installed during startup or shutdown. And on OS X, the spinning beachball was one of the main reasons why I stopped macs for the most part in 2002 or so. I figured it was just a byproduct of OS X still being early in development and computers not being fast enough or having enough RAM. But no, everytime I try a brand new mac, it still pops up, especially when trying to type in a URL or something like that. The bouncing in the dock and not knowing if an app is running or shutdown or not is annoying, too.
But as long as you keep your stuff backed up or in the cloud (like google drive, google music, etc.), and stick mostly to stuff that works cross-platform (Chrome browser, Libreoffice, cross-platform IDEs, etc.), it's very painless to switch being OS's or devices or to wipe and reinstall things. Even Microsoft Word and Excel work in the browser nowadays, though I still usually just stick with Google Docs.